Stay-bolt structure.



J. R. FLANNERY & E. I. DODDS.

STAY BOLTSTRUCTURE. APPLICATION'HLED MAY a. 1918.

1,293,635., Patented Feb. 4,19

ST- E JOHN ROGERS FLANNERY AND ETHAN I. DOIDDS, OF PITTSBURGH, PENNSYLVANIA,

ASSIGNORS T0 FLANNERY BOLT COMlANY, 0F PITTSBURGH, PENNSYLVANIA.

STAY-BOLT STRUCTURE.

Specification of Letters Patent.

Patented Feb. d, 1919.

Application filed May s, 1918. Serial No. 232,298.

To all whom it may concern:

Be it known that we, J OHN Roenns FLAN- NERY and ETHAN I. DoDos, citizens of the United States, and residents of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Stay Bolt Structures; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in staybolt structures for boilers and more particularly to means for closing the outer end of the bearing sleeve, the object of the invention being to provide efficient means whereby the cap or closure may be quickly removed from the bearing sleeve to permit access to the head of the staybolt for testing purposes,the structure being such that the cap or closure will be normally held securely on its seat.

With this and other objects in view, the invention consists in certain novel features of construction and combinations of parts as hereinafter set forth and pointed out in the claims.

In the accompanying drawings; Figure 1 is a longitudinal view; Figs. 2 and 3 are transverse sections on the line 22 of Fig. 1 showing different positions of the parts, and Fig. 41 is an elevation of the bearing sleeve.

1 represents a bearing sleeve adapted for connection with a boiler sheet and provided interiorly with a curved surface 2 to form a bearing for the rounded or spherical head 3 of a stay bolt 4.

The bearing sleeve is formed with an extension 5 surrounding an annular seat 6 for a cap or closure 7 and said sleeve extension is provided with external segmental lugs or shoulders 8 which are inclined to form cams for a purpose hereinafter explained.

The cap or closure 7 may be made with a partly spherical recess 9 having such dimensions and configuration as to afford a proper clearance space for the head of the bolt, and said cap or closure is provided centrally with an outwardly projecting mpple 10 which enters a hole 11 in a head or carrier 12 and upset at its free end, whereby the cap will be loosely connected with the head to permit relative movement of said head and cap.

The head or carrier 12 is hollow to receive the cap 7 and may have an angular or hexagonal exterior portion 13 to receive a wrench. Inwardly projecting segmental shoulders 14, disposed diagonally to form cams, are formed within the peripheral portion of the head 1; and are adapted to engage behind the segmental shoulders 8 on the bearing sleeve extension.

The head 12 is provided interiorly with a plurality of shoulders 15 (each of which may have a general V-shape) and a like number of V-shaped shoulders 16 are formed on the cap or closure 7 to alternate with and to be engaged by the shoulders 15 in the head 1112 and limit the turning movement of said A bent spring disk 17 is disposed between the flat top of the cap 7 and the inner face of the head 12, said disk being provided with a central hole 18 through which the nipple 10 passes.

When the cap and head shall have been assembled, the same will be placed on the end of the bearing sleeve extension and the head will then be turned to cause the segmental cam shoulders 14 in said head to move behind the segmental cam shoulders 8 on the bearing sleeve extension, with the result of compressing the spring disk 17 and causing the same to press the cap firmly to its seat and the cam shoulders to bind against each other. During the turning movement of the head, the shoulders 15 therein will move between the shoulders 16 on the cap and their engagement with the latter will serve to limit the turning movement of the head, so that it will require only a limited reverse turning of the head to release the same and the cap and permit their quick removal to permit access to the head of the bolt for testing purposes.

It will be apparent that our improvements provide means for normally holding the cap securely in place and yet permit its quick removal to facilitate the testing of the bolt. and that the closure may be quickly replaced and secured.

Having fully described our invention, what we claim as new and desire to secure by Letters-Patent, is

1. In a staybolt structure, the combination with a bearing sleeve, and a cap to seat thereon, of a head having cam engagement with the sleeve, and a spring interposed betweenthe head and cap.

2. In astaybo'ltstructure, the combination 1 with a bearing sleeve and a cap to seat thereon, of a head having cam engagement With the bearing sleeve, a spring interposed between the head and cap and stop means for the head.

3. In a staybolt structure, the combination with a bearing sleeve having ea'm shoulders, and a ca to seat on said sleeve, of a head inelosin 5'18 cap and having cam shoulders to cooperate with the cam shoulders on the sleeve, and a spring interposed between the cap and the head.

4L. In a staybolt structure, the combination with a bearing sleeve having cam shoulders, and a cap to seat on said sleeve,o'f ahead inclosing said cap and having cam shoulders to cooperate With the cam shoulders on the bearing sleeve, means loosely connecting the cap with the head, and a spring interposed between the cap and the head. p

5. In a staybolt structure, thecoinbination With a'bearingsleeve having c'aI'n shoulders, of a cap to seat on the bearing sleeve and provided with stop shoulders, a head inclosing the cap and having cam shoulders to cooperate with the cam shoulderson the hearing sleeve, said head also having stop shoulders alternating With the stop shoulders on the cap and adaptedtoengagethesameyand a spring'disk interposed betiveen the cap and the head. I I

In testimony whereof, We have'signed this specification in the presence of twosubscrihing witnesses.

JOHN ROGERS FLANNERY. ETHA'N I. DODDS. Witnesses:

S. G. NOTTINGHAM, R. S. FERGUSON.

Gopiem of this patent'may be obtained for five cents each, by addressing the Gdmmiui'oner of new,

' wuhinztomw. 0." 

